Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAB IROUP 4: .703 - 13%2'5/0'_ '4~ Lab Sample No. 5^ -518 Fi'ter /pe MCE 25 mm Operator S Client Spl. No 12 Filter Area 295 mm-2

Instrument I.D. EM 10 CL: Grid I.P. Disk No.

Screen Magnification 16,400X G0) Area J 24 mm"2 Comments I Arc. voltage 80 kV No. GC to be Analysed 6 4.721 Struct. Corsod. to 70 amm2

El GO. No Coord. r Structure Structure Type

,/r No. F B C M $ J >0.5 um < 5 um Length >, Sum Chrys. I.D. of Structure Amphibole EDS N or/ (Nonasb. Nonasb. Ambig./ND Elements)

3 ,7_, - ~

Lj- .S ,42'i — c,

L [ u I

I n I I Identify all structures usin EDS Check diffraction for aebeatoa Store all unrepeated spectra -

I Photo No. (from I in 5 asbestos- containing samples) Grid acceptance: atructurea u to 70a trim (fat 4) <50% undissolve i er. over app. or o e Struct. _ > 0.5um & > 5:1 Aspect Ratio Totals <10% particulate coverage >50% coverage N= Not Observed (EDS spectrum or dltlrscuan pattern) at least 20 unfolded or overlapped grid squares ✓ o diffraction pattern properties conforming <5% holes or opaque areas r' tl C to laboratory identification criteria observed. Unused portion Far ahrysotilei a.75nm spacing for (020) reflections. of lifter Chrysotile 0.50nm spacing for the Layer line repast. streaking Avoided portion tof (110) and (130) reflections. of titer For amphiboles: 0.50n m layer Una repeat. and approx. Portion of filter (2mm ode) 9.5 ratio of non-twinned layer line spot species to subject to Amphibole examination layer line repeat distance (0.50nm). i EDS spectrum conforming to laboratory ~- AMPHIBOLES i Ambiguous identification criteria observed. F= Single Fiber (1-3 Intersections = 1-3 fibers) Amoaite Bo Bundle >J n bera <1 nber diameter apart) 25mm filter Crocidolite Non —asbestos C= Cluster (>3 intersections) K= Matrix (—~ stoppins Rules: I. Anthophyllite NSD= Na Structures Detected >50 s/G.C. or in let 4 G.J. Tremolite Actinolite 'v on —Identified 1_•\0ATA\PRIVATIi\XlXEG\CA00\TEM3 9/22/98

NYC-WTC 000104279